For those of us using Apple CarPlay, Apple release it's newest OS today and it seems to have fixed some of my more significant gripes with CarPlay on the MY 17 M3.
I was experiencing issues where CarPlay would intermittently work with my iPhone 7 Plus (noticed primarily when I had the device connected via USB) and while there is still a delay, the inconsistent connection seems to have been resolved.
They have added some nice little shortcuts (although to the left hand side of the CarPlay menu) to get to common apps versus having to hit Back and navigate. Unfortunately, it appears that it's trying to get me to go to Apple Maps constantly, but that's another story..
Hopefully others are having positive experiences as well.